Althon manufactures a large range of precast concrete headwalls, covering pipes, culverts and box culverts. Precast headwalls are a cost-effective and practical alternative to in-situ construction. Designed for use in SUDS drainage schemes, for protecting watercourse outfalls from erosion and providing a compliant, durable discharge point across a wide range of civil and infrastructure applications.

  • Precast concrete headwalls

  • Cost effective alternative to in-situ concrete

  • Consistent factory quality control

  • Wide compliant range for adoptable schemes

  • Reduced installation time via factory fitting

  • Low carbon concrete options

  • Suitable for aggressive environments

Range Variants

  • Standard Precast Concrete Headwalls

  • Sewers for Adoption (SFA) 7th Edition Headwalls

  • SFA Inlet and Outlet Headwalls

  • Rectangular Sewers for Adoption (RSFA) Headwalls

  • Anglian Water Specification Headwalls

  • Angled Precast Headwalls

  • Rectangular Headwall Range

  • Rectangular Channel Headwalls

  • Culvert Headwalls

  • Precast Headwalls with Penstocks

  • Splayed Wing Wall Headwalls

  • Narrow Headwalls

  • SFA Headwalls with Precast Steps

  • Swale Inlet Headwall Range

  • Mitred Headwalls

  • Bespoke Headwalls (non-standard requirements)

Factory-Fitted Accessories

  • Flap valves (HDPE and ductile iron)

  • Penstock valves (wall mounted and inline)

  • Kee Klamp handrails

  • Gratings and trash screens

  • Ladders

  • Dissipation blocks

  • Cascade panels

  • Baffle blocks

Materials & Compliance

Manufactured using a low carbon concrete mix compliant with BS 8500-2:2023, including Design Chemical Class 4 and Design Sulphate Class 4.

Suitable for aggressive ground and water conditions.

Options include CARES accredited reinforcement certified to BS EN 15258 and compliance with Severn Trent Water specifications.

Specification & Design Support

  • Free online Headwall Specification Tool

  • Dedicated design service for bespoke requirements

  • Installation video available via website